Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution
Calcium hydroxyapatite, CaHAp, synthesized by the precipitation method, was utilized to study the calcium-lead metathesis reaction on dissolution in a lead nitrate solution under reflux conditions to prepare larger lead hydroxyapatite, PbHAp, crystals from CaHAp. SEM images show development of cryst...
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| Format: | Article |
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/273632 |
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| author | Oratai Saisa-ard Weenawan Somphon Winya Dungkaew Kenneth J. Haller |
| author_facet | Oratai Saisa-ard Weenawan Somphon Winya Dungkaew Kenneth J. Haller |
| author_sort | Oratai Saisa-ard |
| collection | DOAJ |
| description | Calcium hydroxyapatite, CaHAp, synthesized by the precipitation method, was utilized to study the calcium-lead metathesis reaction on dissolution in a lead nitrate solution under reflux conditions to prepare larger lead hydroxyapatite, PbHAp, crystals from CaHAp. SEM images show development of crystalline PbHAp on the surfaces of CaHAp. The needle-like crystal morphology observed for PbHAp after 24 h reaction time developed into hexagonal-rod crystal morphology within 48 h reaction time. The largest PbHAp crystals obtained from 48 h reaction time have approximate size of 10 × 10 × 40 μm. Powder X-ray diffraction results show mixed phases of CaHAp and PbHAp due to difficulty in separating the PbHAp product from the CaHAp substrate. The PbHAp peaks observed after 24 h of reaction sharpen and increase in intensity after 48 h of reaction confirming that the PbHAp phase is the major product for the 48 h reaction time. EDX results of the crystalline products show high intensity Pb peaks with lead to phosphorous ratio (5 : 3) as expected for PbHAp. Lower intensity Ca peaks are also observed, consistent with incomplete coverage of the CaHAp growth substrate. |
| format | Article |
| id | doaj-art-75a800b2977943d0b0bce8ba9fa09d6f |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-75a800b2977943d0b0bce8ba9fa09d6f2025-02-03T01:21:44ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/273632273632Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate SolutionOratai Saisa-ard0Weenawan Somphon1Winya Dungkaew2Kenneth J. Haller3Chemistry Program, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani 34000, ThailandChemistry Department, Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, ThailandSchool of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandSchool of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandCalcium hydroxyapatite, CaHAp, synthesized by the precipitation method, was utilized to study the calcium-lead metathesis reaction on dissolution in a lead nitrate solution under reflux conditions to prepare larger lead hydroxyapatite, PbHAp, crystals from CaHAp. SEM images show development of crystalline PbHAp on the surfaces of CaHAp. The needle-like crystal morphology observed for PbHAp after 24 h reaction time developed into hexagonal-rod crystal morphology within 48 h reaction time. The largest PbHAp crystals obtained from 48 h reaction time have approximate size of 10 × 10 × 40 μm. Powder X-ray diffraction results show mixed phases of CaHAp and PbHAp due to difficulty in separating the PbHAp product from the CaHAp substrate. The PbHAp peaks observed after 24 h of reaction sharpen and increase in intensity after 48 h of reaction confirming that the PbHAp phase is the major product for the 48 h reaction time. EDX results of the crystalline products show high intensity Pb peaks with lead to phosphorous ratio (5 : 3) as expected for PbHAp. Lower intensity Ca peaks are also observed, consistent with incomplete coverage of the CaHAp growth substrate.http://dx.doi.org/10.1155/2014/273632 |
| spellingShingle | Oratai Saisa-ard Weenawan Somphon Winya Dungkaew Kenneth J. Haller Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution Advances in Materials Science and Engineering |
| title | Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution |
| title_full | Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution |
| title_fullStr | Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution |
| title_full_unstemmed | Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution |
| title_short | Evidence of a Lead Metathesis Product from Calcium Hydroxyapatite Dissolution in Lead Nitrate Solution |
| title_sort | evidence of a lead metathesis product from calcium hydroxyapatite dissolution in lead nitrate solution |
| url | http://dx.doi.org/10.1155/2014/273632 |
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